🌊 Popular Dive Sites Koh Chang
Wrecks, reefs & marine parks – explore them all with BB DiversEvery day, the BB Divers boats head out to explore the best dive sites around Koh Chang — from vibrant coral reefs to he spectacular HTMS Chang wreck, and the crystal-clear waters of Koh Rang National Marine Park.
🐠 Where we dive:
Local Koh Chang sites – Lots of really nice dive sites, perfect for fun dives, training, and freediving
HTMS Chang wreck – Thailand’s largest shipwreck and a must-dive site
Koh Rang National Park – We have many dive sites around here known for its pristine reefs and rich marine life
Our daily destinations are chosen based on weather, sea conditions, bookings, and visibility, ensuring every trip offers the best possible experience. Whether you’re diving or snorkeling, you’re welcome on board — many of our coral sites are ideal for both activities.
📍 Click here to view a map of our dive sites
🌐 For more dive sites across Thailand, visit Thai-Scuba.com
⚓ HTMS Chang wreck diving – Thailand’s Largest Shipwreck
🌊 Koh Chang Dive Sites
An unforgettable wreck dive just off the coast of Koh Chang
On 22 November 2012, the HTMS Chang was purposefully sunk to create an artificial reef — and today, it’s the most iconic dive site around Koh Chang. Stretching 100 meters in length, the Chang is Thailand’s largest shipwreck, offering an extraordinary experience for divers of all levels.
Whether you’re an Open Water Diver, an experienced wreck diver, or an underwater photographer, the HTMS Chang delivers spectacular diving, incredible marine life, and endless opportunities for exploration.
🌊 Dive Profile:
Depth: Bottom at 30m, top deck at 20m, captain’s cabin and mast at 12m, top of structure near 5m
Length: 100 meters
Access: ~30 minutes by boat from Koh Chang
Skill Level: Suitable for Open Water Divers and above
With its towering structure and easy access, the Chang allows for progressive penetration training and multi-level exploration. It’s also a favorite site for Deep and Wreck Specialty training.
🐟 Marine Life on the Chang
The wreck has rapidly become a thriving artificial reef, home to an abundance of marine species:
Batfish, filefish, scorpionfish, shrimpfish
Barracuda, squid, octopus, giant groupers
Occasional visits from whale sharks — a true highlight for lucky divers!
Its layered structure and protected location make it a haven for both large pelagics and macro life.
🛥️ Dive Pairing Suggestions:
The HTMS Chang is often combined with other top nearby sites such as:
Hin Luk Bat – dramatic rock formations and coral gardens
Hin Raab – a colorful reef with excellent visibility
Whether it’s your first wreck dive or your 50th, the HTMS Chang is a must-see site in Thailand.
Join BB Divers to explore this epic underwater monument and discover why it’s a favorite among divers from around the world.
🌊 Hin Luk Bat – Pinnacle Diving at Its Best
🌊 Koh Chang Dive Sites
A vibrant underwater playground just off Koh Chang
One of the top dive sites around Koh Chang, Hin Luk Bat is known for its striking pinnacle formation and the vibrant marine life it attracts. A favorite among divers of all levels, this site combines stunning underwater scenery, shoals of fish, and exciting swim-throughs created by massive submerged boulders.
🐠 What You’ll See:
Hin Luk Bat is a hotspot for marine life and surprises at every turn. Keep an eye out for:
Shoals of fusiliers, snappers, and barracuda
Moray eels, stingrays, parrotfish, and large groupers
Butterflyfish, bannerfish, angelfish, and more
Colorful Christmas tree worms carpeting the rock surfaces
It’s also a fantastic night dive location, offering a totally different atmosphere once the sun sets.
🧭 Dive Info:
Location: ~3 km southwest of Koh Chang
Depth: 5–16 m typical / Max depth 25 m
Visibility: 3 to 20 meters
Great for: Scuba diving, snorkeling, and night diving
With its mix of gentle slopes, rocky formations, and lively reef life, Hin Luk Bat offers something for every diver — from relaxed exploration to more adventurous swim-throughs.
Join BB Divers to explore Hin Luk Bat — one of the most diverse and dynamic dive sites Koh Chang has to offer.
Great for daytime fun, even better after dark.
🌊 Hin Raab – A Trio of Underwater Treasures
🌊 Koh Chang Dive Sites
Three unique dive sites in one stunning location
Just 5 km south of Koh Chang, Hin Raab is a rocky dive site known for its diverse coral life and rich marine biodiversity. What makes this spot extra special is that it actually consists of three distinct dive sites, each offering its own unique features and marine encounters.
🪸 Site 1: Around the Rock
Circle the main rocky formation, a favorite among divers for its vibrant coral and exciting marine life. Expect to see:
Turtles, batfish, stonefish, porcupine fish, and stingrays
Moray eels, large barracuda, and occasional whale shark sightings
Abundant soft coral and excellent visibility
🐠 Site 2: Secret Reef (North Side)
A slightly deeper site located to the north, Secret Reef features a picturesque mini canyon and even more diverse coral formations.
Marine life includes:
Rays, groupers, angelfish, triggerfish, parrotfish
Anemone fish and morays
Occasional visits from turtles
⚓ Site 3: T11 Wreck
A small sunken vessel adds an adventurous twist to your dive. The T11 wreck is great for exploring nooks and crannies where fish and critters love to hide.
📍 Dive Info:
Location: ~5 km south of Koh Chang
Depth: Avg. 11 m / Max. 16 m
Visibility: 3 to 20 meters
Ideal for: Scuba diving, snorkeling, macro photography
Hin Raab’s versatility, marine richness, and occasional big visitors make it a top pick for both beginners and experienced divers alike.
Join BB Divers and explore all three faces of Hin Raab — a hidden gem beneath the waves.
Let us know your goals, and we’ll take you to the perfect part of this dynamic dive site.
⚓ T11 Wreck – A Fragmented Gunship with a Story
🌊 Koh Chang Dive Sites
Wreck meets reef on this unique Koh Chang dive
Located near Hin Raab, the T11 Wreck is a smaller gunship intentionally sunk in 2013 to create an artificial reef and diving site. Though originally resting intact, the wreck has since been damaged by naval target practice, leaving it scattered in pieces across the seafloor — but still full of character and marine life.
🔧 Dive Highlights:
Length: ~30 meters
Depth: Max. 16 meters
Condition: Broken but accessible, with visible sections of structure
Marine life: Often home to groupers, lionfish, eels, and schooling fish
Despite its fragmented state, the T11 wreck remains a fascinating site for wreck lovers, macro photographers, and explorers. The dive often continues toward Hin Raab’s nearby reef, creating a varied and dynamic dive profile.
🧭 Why Dive It:
Easy to combine with Hin Raab 1 or 2
Great for practicing wreck navigation skills
Adds variety to reef dives with a short wreck adventure
Depth and layout make it accessible for Open Water divers and up
Even in pieces, the T11 tells a story.
Join BB Divers for a combo dive at T11 and Hin Raab — wreck meets reef in one rewarding underwater journey.
🪨 Blueberry Hill - Rocky Reef South of Hin Raab
🌊 Koh Chang Dive Sites
A hidden gem for macro lovers and fish encounters
Just 5 km south of Koh Chang and close to Hin Raab, this small, bare rocky site might not look like much from above — but underwater, it’s teeming with marine life. While not ideal for snorkelers due to its depth and lack of shallow coral, this site is a favorite among divers, especially those with an eye for detail.
🐟 What You’ll See:
Nudibranchs galore – great for macro photography
Batfish, stingrays, moray eels, groupers, and more
A beautiful coral garden on the south side, rich in color and contrast
This site is best explored slowly, allowing time to notice the hidden life tucked among the rocks and coral.
🧭 Dive Info:
Location: ~5 km south of Koh Chang
Depth: Max. 16 meters
Visibility: 3 to 20 meters
Ideal for: Scuba divers, macro enthusiasts, relaxed reef exploration
A lesser-known spot with a lot to offer beneath the surface.
Join BB Divers and add this vibrant, fish-filled reef to your diving itinerary around Koh Chang.
🪸 Hin Rua Tek - Hidden Rocky Reef – A Diver’s Delight on a Clear Day
🌊 Koh Chang Dive Sites
Unique topography and critter-spotting opportunities near Koh Chang
Located just 3 km south of Koh Chang, this rocky reef offers a fascinating underwater landscape filled with crevices, coral structures, and marine surprises. While it’s not known for dense coral coverage or consistent visibility, on a good day, it’s a brilliant dive — and a favorite among divers who enjoy exploration and macro life.
🔍 What Makes It Special:
Intriguing rock formations and crevices
Look for shrimp, nudibranchs, lobsters, and other cryptic critters
Large table corals, gorgonian sea fans, soft corals, and sponges
Great for relaxed exploration and photography when visibility allows
This site isn’t always on our regular dive plan, simply due to varying visibility, but when conditions are good, it offers a peaceful, visually rich experience that’s well worth the dive.
🧭 Dive Info:
Location: ~3 km south of Koh Chang
Depth: Avg. 10 m / Max. 16 m
Visibility: 2 to 15 meters
Good for: Scuba diving, macro life spotting, occasional snorkeling
A hidden gem for divers who love the search.
Ask about this site if you’re looking for something a bit different and conditions are right — BB Divers will take you there when the sea is clear!
🐠 Hin Saam Sao - Northwest Reef – A Reef in Recovery
🌊 Koh Chang Dive Sites
A close-to-shore dive with vibrant marine life and resilient coral
Located off the northwest coast of Koh Chang, this reef offers lively fish activity and pockets of healthy coral, making it a pleasant dive site — especially for those interested in marine ecosystem recovery. Due to its proximity to land, visibility here can be variable, but the site still has plenty to offer on the right day.
One section of the reef suffered blast damage from past dynamite fishing, but nature is doing its work, and coral regrowth is steadily improving.
🐟 What to Expect:
Colorful reef fish and interesting coral structures
A glimpse into a resilient marine ecosystem bouncing back
Great for those who enjoy slower-paced dives with a focus on observation
A good training or second-dive site when sea conditions are calm
🧭 Dive Info:
Location: Northwest of Koh Chang
Depth: Avg. 11 m / Max. 16 m
Visibility: 2 to 10 meters
Ideal for: Scuba divers, eco-focused explorers
Not the clearest site — but full of life and an important reef story.
BB Divers brings you here when the conditions are right and you’re up for a dive that’s both meaningful and enjoyable.
🪨 Hin Raab North - Nearby Reef South of Hin Saam Sao
🌊 Koh Chang Dive Sites
A quiet, lesser-known dive site near Koh Chang
Located about 5 km south of Koh Chang, this site lies very close to Hin Saam Sao and shares many of the same features. It’s a rocky reef environment with similar marine life, making it a good alternative or complement to its better-known neighbor.
While not often visited, this spot offers a peaceful dive with modest coral formations and potential for critter spotting, especially when visibility is favorable.
🧭 Dive Info:
Location: 5 km south of Koh Chang
Depth: Max. 18 meters
Visibility: 2 to 10 meters
Ideal for: Scuba diving and exploratory dives
A quiet site for divers who like to explore off the beaten path.
Ask BB Divers about including this location when diving Hin Saam Sao or nearby reefs.
🏝️Koh Khlum - Island Reef – Shallow, Colorful, and Beginner-Friendl
🌊 Koh Chang Dive Sites
A calm and vibrant dive site perfect for courses and easy exploration
Located 5 km south of Koh Chang, this small island offers a handful of shallow dive spots that range between 5 and 10 meters in depth. With generally calm conditions and excellent visibility on most days, it’s an ideal site for beginner divers, PADI courses, or refreshers.
🐠 What Makes It Special:
Unique marine life compared to nearby sites
Great for spotting larger starfish, sea urchins, anemones, and clownfish
A favorite among returning divers looking for something different
Safe and engaging for divers still gaining confidence underwater
🧭 Dive Info:
Location: 5 km south of Koh Chang
Depth: 5–10 meters
Ideal for: Beginner divers, training dives, relaxed fun dives
Conditions: Usually calm; suitable for snorkeling on some sides
Gentle, colorful, and full of character – this island site is a hidden gem for easygoing underwater exploration.
Join BB Divers and revisit the joy of diving in a simple, stunning setting.
🛕 Hin Ga Daeng (Koh Rang pinnacle) - Koh Rang’s Deepest Dive
🏝️ Koh Rang National Park Sites
A dramatic underwater pinnacle for experienced divers
Just 1 km northwest of Koh Rang, this spectacular pinnacle is known among divers as “The Cathedral” due to its towering rock formation and cavern-like structure. As the deepest dive site in the Koh Rang area, it’s a true multilevel adventure, ideal for experienced divers seeking something extraordinary.
🌊 What to Expect:
Average depth: 15 meters
Maximum depth: 30 meters
Visibility: 5 to 30 meters
Currents: Can be strong and unpredictable — for confident divers only
The site features minimal coral but boasts incredible rock formations and rich marine life, making it a prime location for underwater photography and exploration.
🐠 Marine Life Highlights:
Large barracuda, groupers, and porcupine fish
Triggerfish, sweetlips, nudibranchs, and even turtles
Schools of batfish swirling around the pinnacle
A sense of depth, scale, and mystery that makes this a favorite among underwater photographers
An unforgettable dive for those ready to go deeper.
Join BB Divers and explore “The Cathedral” — one of the most striking and rewarding dive sites around Koh Rang.
🌿Koh Thien West - Coral Comeback Island – A Reef Reborn
🏝️ Koh Rang National Park Sites
An inspiring recovery story and a top snorkeling destination
Located just northwest of Koh Rang, this small island is a testament to the resilience of coral reefs. Years ago, much of its coral was damaged — but today, it stands as a thriving underwater haven, beautifully reborn.
One of the site’s standout features is found on its southern side, where you’ll discover one of the largest stag horn coral formations in the region. This stunning coral field provides shelter for a wide variety of reef fish, creating a lively and colorful underwater scene.
🐟 What You’ll See:
Expansive stag horn coral gardens
Anemone fish, damselfish, butterflyfish, and more
A rich and recovering reef ecosystem
Excellent for snorkeling and shallow dives
🧭 Dive Info:
Location: Just northwest of Koh Rang
Depth: Average 10 m / Max. 16 m
Ideal for: Snorkelers, beginner divers, nature lovers
Visibility: Often excellent in calm conditions
A feel-good dive site where nature takes the spotlight.
Join BB Divers to witness this reef’s spectacular comeback — and enjoy a peaceful, vibrant snorkel or shallow dive session.
🐠 Hin Kuak Ma (or three finger reef) - A Highlight of Koh Rang National Park
🏝️ Koh Rang National Park Sites
Wall, reef, and wildlife all in one unforgettable dive
Just 1 km northeast of Koh Rang, Koh Tun is widely considered one of the top dive sites in the national park. This small island packs a variety of underwater landscapes and marine encounters into one dive, making it a favorite for both new and experienced divers.
🌊 Dive Highlights:
South side: A rugged rock wall perfect for spotting moray eels, nudibranchs, stonefish, and other hidden critters
Back side: A gentle sloping reef, rich with coral and teeming with marine life
Fish life: Expect to see blue-spotted stingrays, parrotfish, blue-ringed angelfish, and on lucky dives, a bamboo shark or turtle
With excellent coral cover and abundant fish, this site also offers great snorkeling conditions when currents are calm.
🧭 Dive Info:
Location: ~1 km northeast of Koh Rang
Depth: Average 10 m / Max. 16 m
Visibility: Typically 10 to 30 meters
Ideal for: All levels of divers, snorkelers (on calm days)
Koh Tun offers variety, beauty, and marine surprises — all in one dive.
Join BB Divers and explore one of the gems of Koh Rang Marine Park.
🐚 Koh Yak and Koh Laun - The Twin Islands – Shallow Reefs, Rich Life
🏝️ Koh Rang National Park Sites
A favorite among divers for long, relaxed reef exploration
Located about 1 km southeast of Koh Rang, these two small islands are encircled by vibrant coral reefs and teeming with colorful reef fish. Their compact size means you can often dive entirely around each island, making for a unique and scenic underwater journey.
Thanks to the shallow depth range, divers enjoy extended bottom time, allowing for a more immersive experience with plenty of time to explore the reef and observe the marine life.
🐠 What You’ll See:
A healthy mix of hard and soft corals
Rich fish life including butterflyfish, parrotfish, damselfish, and more
Great for spotting macro life and underwater photography
Calm, shallow conditions ideal for relaxing dives and long snorkel sessions
🧭 Dive Info:
Location: ~1 km southeast of Koh Rang
Depth: Avg. 8 m / Max. 12 m
Visibility: 5 to 20 meters
Ideal for: Beginners, snorkelers, relaxed divers
A tranquil site with color, life, and easy diving — no wonder it’s a diver favorite.
Join BB Divers for a slow and stunning circuit around the Twin Islands reef.
🪸 Koh Tong Lang and Koh Kra - Color Rock Islands – Coral Gardens with Snorkel & Dive Appeal
Koh Rang National Park sites
A vibrant shallow site with stunning rock formations and healthy coral
Located about 1.5 km northeast of Koh Rang, these small islands are best known for their excellent snorkeling, but also offer some beautiful shallow dives. The standout feature is their uniquely colored rock formations, which create crevices and overhangs brimming with fish life and marine diversity.
Beneath the surface, you’ll find a thriving coral garden with an impressive variety of species. From large table corals to vibrant anemones and dense stag horn formations, it’s a photographer’s dream and a peaceful place for reef exploration.
🐠 Marine Life & Features:
Colorful rock structures with fish-filled crevices
Healthy coral including table coral, stag horn, and anemones
Excellent for snorkeling and long, easy dives
Common sightings include clownfish, butterflyfish, parrotfish, and more
🧭 Dive Info:
Location: ~1.5 km northeast of Koh Rang (northern tip)
Depth: Average 7 m / Max. 12 m
Visibility: 5 to 30 meters
Ideal for: Snorkelers, beginner divers, relaxed reef dives
Vivid, calm, and teeming with life — this site is a gem for snorkelers and divers alike.
Join BB Divers and enjoy a colorful, coral-rich experience at Color Rock Islands.
🏝️ Koh Wai – A Peaceful Island Getaway
Perfect for snorkeling, training dives, and relaxed day trips
Located just south of Koh Chang, Koh Wai is a tropical paradise island that offers crystal-clear waters, beautiful beaches, and protected reefs, making it ideal for a half-day excursion or even an overnight stay.
While the reef around Koh Wai is relatively shallow, it boasts excellent snorkeling right off the beach, and offers safe, easy diving conditions — especially on the rocky southern side and offshore pinnacles nearby. These features make it a great site for beginner dives, training dives, and Discover Scuba Diving experiences.
🐠 What to Expect:
Shallow, protected reef dives perfect for beginners
Lovely pinnacle formations and rocky reef edges
Excellent snorkeling with good visibility and vibrant reef life
Calm conditions — ideal during rainy season or windy weather
Often combined with fun excursions or first-time diving courses
🧭 Dive Info:
Location: South of Koh Chang
Depth: Shallow reef, with pinnacles offering more depth
Visibility: Typically 10 to 25 meters
Ideal for: Discover Scuba Diving, snorkelers, training dives, calm-weather backups
A peaceful escape and one of the best places to dip into diving for the first time.
Join BB Divers for a relaxing day around Koh Wai — a favorite for snorkeling, discovering scuba, or just soaking in the island vibe.
⚓Thonburi wreck - The Koh Chang Wreck – A Historic, Undivable Site
Famous in name, but not a diveable destination
Also known as the Koh Chang wreck, this historic site marks the location of a naval battle between the Thai and French fleets during the Franco-Thai War. It is mentioned in several dive guides due to its historical significance, but in reality, the site lies in silt-heavy waters with zero visibility almost year-round.
Due to these conditions, it is not suitable for diving. We include it here purely for reference, as it sometimes appears in dive site listings — but BB Divers does not organize dives at this site.
🧭 Quick Facts:
Type: Historical wreck
Depth & Conditions: Extremely poor visibility, heavy silt
Status: Undivable
Mentioned in: Historical dive guides, not in active use
A note for history buffs — worth reading about, but not exploring underwater.
Let us know if you’re interested in more diveable wrecks like the spectacular HTMS Chang instead!
🌴 Koh Phe – A Hidden Coral Gem
📍 Diving at Koh Mak Area
Small island, big reef life
Koh Phe is a charming, small island located in the waters near Koh Chang, surrounded by a healthy coral reef that makes it a delightful spot for divers and snorkelers alike. With a maximum depth of around 15 meters, it’s perfect for relaxed fun dives, macro spotting, or easygoing exploration.
The site offers a variety of coral species and is home to a lively mix of reef fish and critters, making it a great option for photographers or those who enjoy observing the smaller details of marine life.
🐠 Dive Highlights:
Ring of coral surrounding the island
Colorful reef fish, nudibranchs, and macro life
Good site for calm dives and snorkel sessions
Excellent for divers of all levels
🧭 Dive Info:
Depth: Max. 15 meters
Visibility: Typically 8–20 meters
Ideal for: Fun dives, macro photography, beginner to intermediate divers
Small in size, rich in marine life – Koh Phe is a quiet reef escape.
Dive sites @ Koh Kood
If you are planning to visit both islands, find the dive sites around Koh Kood here:
